<template>
  <el-aside class="editor-left" width="261px">
    <el-scrollbar>
      <el-collapse v-model="extendGroups">
        <el-collapse-item
          v-for="group in groups"
          :key="group.name"
          :name="group.name"
          :title="group.name"
        >
          <draggable
            class="component-container"
            ghost-class="draggable-ghost"
            item-key="index"
            :list="group.components"
            :sort="false"
            :group="{ name: 'component', pull: 'clone', put: false }"
            :clone="handleCloneComponent"
            :animation="200"
            :force-fallback="true"
          >
            <template #item="{ element }">
              <div>
                <div class="drag-placement">组件放置区域</div>
                <div class="component">
                  <Icon :icon="element.icon" :size="32" />
                  <span class="mt-4px text-12px">{{ element.name }}</span>
                </div>
              </div>
            </template>
          </draggable>
        </el-collapse-item>
      </el-collapse>
    </el-scrollbar>
  </el-aside>
</template>

<script setup lang="ts">
  import draggable from 'vuedraggable'
  import { componentConfigs } from '../components/mobile/index'
  import { cloneDeep } from 'lodash-es'
  import { DiyComponent, DiyComponentLibrary } from '@/components/DiyEditor/util'
  import { reactive, watch } from 'vue'
  /** 组件库 */
  defineOptions({ name: 'ComponentLibrary' })

  // 组件列表
  const props = defineProps<{
    list: DiyComponentLibrary[]
  }>()
  const groups = reactive<any[]>([])
  // 展开的折叠面板
  const extendGroups = reactive<string[]>([])
  watch(
    () => props.list,
    () => {
      // 清除旧数据
      extendGroups.length = 0
      groups.length = 0
      // 重新生成数据
      props.list.forEach((group) => {
        // 是否展开分组
        if (group.extended) {
          extendGroups.push(group.name)
        }
        // 查找组件
        const components = group.components
          .map((name) => componentConfigs[name] as DiyComponent<any>)
          .filter((component) => component)
        if (components.length > 0) {
          groups.push({
            name: group.name,
            components
          })
        }
      })
    },
    {
      immediate: true
    }
  )

  // 克隆组件
  const handleCloneComponent = (component: DiyComponent<any>) => {
    return cloneDeep(component)
  }
</script>

<style scoped lang="scss">
  .editor-left {
    z-index: 1;
    flex-shrink: 0;
    box-shadow: 8px 0 8px -8px rgb(0 0 0 / 12%);

    :deep(.el-collapse) {
      border-top: none;
    }

    :deep(.el-collapse-item__wrap) {
      border-bottom: none;
    }

    :deep(.el-collapse-item__content) {
      padding-bottom: 0;
    }

    :deep(.el-collapse-item__header) {
      height: 32px;
      padding: 0 24px;
      line-height: 32px;
      background-color: var(--el-bg-color-page);
      border-bottom: none;
    }

    .component-container {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
    }

    .component {
      display: flex;
      width: 86px;
      height: 86px;
      cursor: move;
      border-right: 1px solid var(--el-border-color-lighter);
      border-bottom: 1px solid var(--el-border-color-lighter);
      flex-direction: column;
      align-items: center;
      justify-content: center;

      .el-icon {
        margin-bottom: 4px;
        color: gray;
      }
    }

    .component.active,
    .component:hover {
      color: var(--el-color-white);
      background: var(--el-color-primary);

      .el-icon {
        color: var(--el-color-white);
      }
    }

    .component:nth-of-type(3n) {
      border-right: none;
    }
  }

  /* 拖拽占位提示，默认不显示 */
  .drag-placement {
    display: none;
    color: #fff;
  }

  .drag-area {
    /* 拖拽到手机区域时的样式 */
    .draggable-ghost {
      display: flex;
      width: 100%;
      height: 40px;

      /* 条纹背景 */
      background: linear-gradient(
        45deg,
        #91a8d5 0,
        #91a8d5 10%,
        #94b4eb 10%,
        #94b4eb 50%,
        #91a8d5 50%,
        #91a8d5 60%,
        #94b4eb 60%,
        #94b4eb
      );
      background-size: 1rem 1rem;
      transition: all 0.5s;
      justify-content: center;
      align-items: center;

      span {
        display: inline-block;
        width: 140px;
        height: 25px;
        font-size: 12px;
        line-height: 25px;
        color: #fff;
        text-align: center;
        background: #5487df;
      }

      /* 拖拽时隐藏组件 */
      .component {
        display: none;
      }

      /* 拖拽时显示占位提示 */
      .drag-placement {
        display: block;
      }
    }
  }
</style>
